<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <div id="bars"> <div class="bar" data-percent="90"> <canvas class="bar-circle" width="70" height="70"></canvas> </div> </div> </div> </div>

(function() { var Progress = function( element ) { this.context = element.getContext( "2d" ); this.refElement = element.parentNode; this.loaded = 0; this.start = 4.72; this.width = this.context.canvas.width; this.height = this.context.canvas.height; this.total = parseInt( this.refElement.dataset.percent, 10 ); this.timer = null; this.diff = 0; this.init(); }; Progress.prototype = { init: function() { var self = this; self.timer = setInterval(function() { self.run(); }, 25); }, run: function() { var self = this; self.diff = ( ( self.loaded / 100 ) * Math.PI * 2 * 10 ).toFixed( 2 ); self.context.clearRect( 0, 0, self.width, self.height ); self.context.lineWidth = 10; self.context.fillStyle = "#000"; self.context.strokeStyle = "#555555"; self.context.textAlign = "center"; self.context.fillText( self.loaded + "%", self.width * .5, self.height * .5 + 2, self.width ); self.context.beginPath(); self.context.arc( 35, 35, 30, self.start, self.diff / 10 + self.start, false ); self.context.stroke(); if( self.loaded >= self.total ) { clearInterval( self.timer ); } self.loaded++; } }; var CircularSkillBar = function( elements ) { this.bars = document.querySelectorAll( elements ); if( this.bars.length > 0 ) { this.init(); } }; CircularSkillBar.prototype = { init: function() { this.tick = 25; this.progress(); }, progress: function() { var self = this; var index = 0; var firstCanvas = self.bars[0].querySelector( "canvas" ); var firstProg = new Progress( firstCanvas ); var timer = setInterval(function() { index++; var canvas = self.bars[index].querySelector( "canvas" ); var prog = new Progress( canvas ); if( index == self.bars.length ) { clearInterval( timer ); } }, self.tick * 900); } }; document.addEventListener( "DOMContentLoaded", function() { var circularBars = new CircularSkillBar( "#bars .bar" ); }); })();